Compressed air gun



- Oct. 1, 1935.

M. L. J. LAMBERT ET AL COMPRESSED AIR GUN Filed June '7. 1954 f n 1 gmWm m Z/qw a d, an mam Patented Oc't. 1, 1935 (UNITED 'iPAT-ENT OFFICECOMPRESSED-AIRJGUN L'Marion L. i J. iLambert, St. Louis, and "CalvinLatham, St." Louis! County; Mo assignors of 'one-thirdto'Isaac'DeKelley, Jr.,-St. Louis; Mo.

AppIicationJune 'L' 1934, Serial No.i"729,376

3 Claims. .(Cl. 221-''l3.5')

tions contains mechanism for opening the car- .tridge or shell l andcontrolling the discharge of the compressed airtherefrom, and sealingdevices for'preventing loss of the compressed air. Another object of theinventionis to provide wanimproved compressed air gun embodying novelmechanism for controlling the discharge of compressed air therefrom.

. Other objects will appear from the following description, referencebeingmade to the annexed drawing, in which Fig. Us a side elevation ofour improved compressed air gun.

[Fig.2 is a greatly enlarged longitudinal secltional" view.

Fig. 3is a side elevationypartly'insection, of a combined puncturing,sealing and .passage forming elementincluded'in the invention.

Our. improved portable compressed air gun "comprises ahousing includinga hollow cylindrical member I permanently closed at one end and havingthe opposite end open and interiorly 35 threaded. An opposite end member2 of the housing is of approximately the samediameter as the diameter ofthe member I and is provided on one end with a reduced externallythreaded extension 3 screwed into the open threaded end 40 of the memberI. Portions ofthe peripheral-surfaces of the members I' and 2imay beknurled or spotted, so that theysr'nay be firmly held when the'parts Iand 2. are screwed-together or are unscrewed.

. An elastic hollow body 4 is mountedwithin .the extension 3 ofthe'member l andis. supported therein byairing 5 screwed'into the innerend "of the extension 3 and engaging a circumferential shoulder onthebody 4. "The inner end portion of 50 the body 4 extends through the ring5.

A' cartridge or shell? 6 containing. compressed airor gas isrmounted inthe member I andhas a tapered endportion I'extendingintoth hollowelastic body 4 and compressing said body between the tube 13 is beveledto provide a sharp cutting edge l5,'which will cut through and puncturethe outer end wall 16 of the cartridge or shell 6 v in the relationshipshown. The opening through the tube l3 opens through a passage ll intothe p the inner end of the part l2 and the end wall I6 the end'portionland the parts 3 and 5 in order to form a hermetic joint betweensaidparts.

' The inner end of the end portion 2 is formed with a recess, comprisingthe relatively large recess is less than the diameterof the elastic 1body 4.

A' combined'puncturing, sealing and passageforming element is mounted inthe recess 8'9 10 and extends into the body 4. Said element comprises acylindrical part lllmounted in the part 9 of the recess, an annularflange ll mounted'in the'part 8 of the recess, a cylindrical extensionl2mounted in the central opening in the body 4, and a puncturing'tube l3extending from the inner'end of the extension I2. An elastic sealinggasket I4 is mounted in a concave recess in the flange llaround the partII]. The inner end of when the members I and 2 are screwed togetherrecessQ beyond the outer end of the part II]. A

passage IB'opens through the parts'lfl and 12 to form communication fromthe. space between of the cartridge or shell so as to permitanycompressed air or gas to passfrom said space to the outer end of thepart ID.

A valve chamber 19 is formed in the member 2v and has communication withthe cavity 9 through a port 20. The outer end 015 the member 2 is'formed with an internally threaded recess into which a plug 2| isscrewed, the inner end of said plug pressing against a metalliccompression washer 22 seated on a combined elastic sealing washer andvalve seat 23 mounted in the inner end of said recess.

-' A valve; comprising an annular wall 24 mounted for longitudinalsliding movements in the valve part land the relatively small part 9concentric 5 therewith. The diameter of the part 8 of said the valve isthus closed, it is impossible for the compressed air or gas to pass thevalve.

A spacer ring 29 is seated against the outer end of the plug 2| and hasan opening 30 through one side thereof communicating with an outletpassage 3| through the member 2. A tubular connecting device 32 has oneend secured to the member 2 and communicating with the passage 3| andconstitutes means whereby the compressed air or gas may be dischargedand controlled, as desired.

An elastic washer 33 is seated on the ring 29 and supports a metallicwasher 34. A plug 35, screwed in the outer end of the member 2, supportsand guides a valve stem 36, having its inner end slightly spaced fromand in alinement with the outer end of the valve stem 25. An annularflange 31 is rigid with the valve stem 36 and bears against the outersurface of the washer 34. A spring 38 encircles the valve stem 36 andhas one end seated against the plug 35 and the opposite end engaging anenlargement 39 on the valve stem 36 and is effective to move said valvestem outwardly to its unoperated position. A knob or button 40 isattached to the outer end of the stem 36 for convenient engagement bythe thumb or any one of the fingers in order to move the valve stem 36inwardly in opposition to the spring 38.

To adapt the invention for use, a shell or cartridge 6 containingcompressed air or gas or the like is mounted in the member I with thetapered end 1 thereof outwardly. Then the member 2 is screwed into closeengagement with the member the tube I3 cutting through the end wall l6of the shell or cartridge and extending into the shell or cartridge fora short distance, as shown. This permits the compressed air or gas topass through the tube 3 and the passage I l to the space beyond theouter end of the part It). Any compressed air or gas escaping from theshell or cartridge around the tube |3 may pass to the outer end of thepart II] through the part l8. From the cavity space 9 the compressed airor gas may pass through the port into the valve chamber l9 but cannotescape from said chamber because of the sealing engagement of thecombined valveseat and sealing washer 23 with the end of the valve 24and with the member 2. When it is desired to discharge any of thecompressed air or gas, the stem 39 is pressed inwardly in opposition tothe spring 38 a distance sufiicient to engage the outer end of the stem25 and to move said stem 25 longitudinally to disengage the valve 24from the combined valve seat and sealing gasket 23. This permits thecompressed air or gas in the valve chamber l9 to pass around the valve24 and thence around the valve stem 25, through the opening 4| andthrough the hole 21, around the disc 26 and outwardly through 30, 3| and32. When the valve stem 39 is released, the spring 38 moves the sameoutwardly and the spring 28 moves the valve stem 25 outwardly and.thereby moves the valve 24 into close sealing engagement with thecombined elastic valve seat and sealing washer 23.

This invention may be applied to various uses and may be modified withinthe scope of equivalent limits without departure from the nature andprinciple thereof.

We claim:

1. A compressed air gun comprising a housing having a valve chambertherein and an inlet passage opening into said chamber, an elastic valveseat at the outer end of said chamber and havin an outlet passagetherethrough, devices mounted in said housing clamping said valve 5 seatin position and having a chamber therein communicating with said outletpassage and opening to the outside of said housing, a valve mounted insaid valve chamber having an annular portion movable into and out ofengagement with 10 said valve seat and having a stem extending throughsaid outlet passage into said last named chamber, a member attached tosaid valve stem in said last named chamber guiding said valve stem inlongitudinal movements, a spring con- 5 nected with said valve stem insaid last named chamber for moving said valve into engagement with saidvalve seat, and a stem supported by said housing in axial alinement withsaid valve stem for moving said valve stem in opposition to said 20spring to disengage said valve from said valve seat. 1 1

2. A compressed air gun comprising a housing having a valve chambertherein and an inlet passage opening into said chamber, a valve seat atthe 25 outer end of said chamber and having an outlet passagetherethrough, a member mounted in said housing holding said valve seatin position and having a chamber therein communicating with said outletpassage to the outside of said hous- 30 ing, a valve mounted in saidvalve chamber movable into and out of engagement with said valve seatand having a stem extending through said outlet passage'into said lastnamed chamber, a part attached to said valve stem in said last namedchamber guiding said valve stem in longitudinal movements, a springmounted on said valve stem for moving said valve into engagement withsaid valve seat, a support at the outer end of said chamber, and astem'mounted for sliding move- 40 ments in said support in axialalinement with said valve stem for moving said valve stem in oppositionto said spring to open said valve.

3. A compressed air gun comprising a housing having a valve chambertherein and an inlet passage opening into said chamber, a valve seat atthe outer end of said chamber and having an outlet passage therethrough,a member mounted in said housing holding said valve seat in position andhaving a chamber therein communicating with said outlet passage to theoutside of said housing, a valve mounted in said valve chamber movableinto and out of engagement with said valve seat and having a stemextending through said outlet passage into said last named chamber, apart attached to said valve stem in said last named chamber guiding saidvalve stem in longitudinal movements, a spring mounted on said valvestem for moving said valve into engagement with said valve seat, asupport at the outer end of said chamber, a stem mounted for slidingmovements in said support in axial alinement with said valve stem formoving said valve stem in opposition to said spring to open said valve,and detachable means supported by said housing for discharging airthrough said inlet passage into said valve chamber.

MARION L. J. LAMBERT. CALVIN LATIHAM.

